Rafhlaða- Up to 1 hour longer battery life than iPhone 6s Plus- Built-in rechargeable lithium-ion battery- Charging via USB to computer system or power adapter- Talk time: Up to 21 hours on 3G- Internet use: Up to 13 hours on LTE/3G, up to 15 hours on Wi‑Fi- Wireless video playback: Up to 14 hours- Wireless audio playback: Up to 60 hours- Standby time: Up to 16 days